Improvement in blower-case



UNITED STATES PATENT GEETCE.V

BENJAMIN F. STURTEVANT, OF BOSTON, MASSACHUSETTS.

IMPROVEMENNT IN BLOWER-CASE.

Specification forming part of Letters Patent No. @7,523, dated March 2,1869.

To all persons to 'whom these presents may come:

Be it known that I, BENJAMIN F. STURTE- VANT, of Boston, in the countyof Suffolk and State of Massachusetts, have made a new and usefulinvention having reference to the Cases of Air-Blowers or theFan-VVheels thereof; and I do hereby declare the same to be fullydescribed in the following spreciiication,

and represented in the accompanying drawbeing riveted to the peripheralsections7 which are connected with the side plates by screws orequivalent devices.

In the drawings, A and A are the two side plates. B O D E are the archedand peripheral sections; and F F F are the connecting and joint-breakingplates, the whole being arranged and formed in manner as represented,

and constituting ablowe'r-'case having an eduction-mouth, G. Foot-piecesH H are cast upon the lower peripheral section, E, and project from itfor the purpose of supporting the case upon a loor. or stand. Y

Each of the side plates has a circular aper- Furthermore, each sideplate has formed in it, and about its opening, an annular recess, r, forthe purpose of diminishing the reslstance which the wheel, whilerevolving, meets with from the friction of the air.

The wheel-case may be circular, but I prefer to have it scroll-shaped inform, as represented in the drawings. It is intended to make the case ofcast metal.

There are difficulties attendant on the casting of the arched peripheryor rim in one piece, which are obviated by casting it in separatesections, and connecting them by plates to extend across the joints ofthe sections, and be riveted to the sections.

I claimy 1. The arrangement of the side plates and the peripheral archedsections connected together, so as to constitute a blower-case.

2. I also claim each side plate as made with a dovetailed concentricgroove, a, extending about its opening, and arranged as set fort-h.

B. F. STURTEVANT.

Witnesses:

It. H. EDDY, SAMUEL N. PIPER.

